Design And Implementation Of Network Resource Detection And Visualization System

Recently,with the rapid development of various hardware technologies and the Internet of Things,more and more scientific instruments,such as industrial control equipment and large scientific instruments,are connected to the Internet.On one hand,it enables scientific researchers to control these equipments effectively and facilitates the cooperation between different devices.On the other hand,due to the Internet connections,it also gives hackers an opportunity to access these equipments more easily.Hackers can take over the equipments' control through vulnerabilities.These vulnerabilities are able to lead to loss of resources and what's worse bring some potential damages to the national security.The question,how to safely control the relevant scientific instruments without the loss of facility of internet connection,gains more and more importance among researchers.These devices can be searched and identified through network scanning or judgments based on communication protocols.Collecting the information shared by these devices and protecting them are important safeguard measures which enable these devices to operate safely and smoothly.The detection of the network equipment resources and the visualization of the results are key points of the measure.The bottleneck of traditional scanning and probing technology is the insufficient bandwidth of the scanning machine,which leads to the problem of low scanning efficiency.The combination of multi-host bandwidth and the use of different scanners for special equipment are two topics that are worthy of research in improving the scanning efficiency.This thesis,written from the perspective of system security management personnel,is based on a deep analysis of the open source software nmap and its method of collecting information of the entire IPv4 network equipment.The purpose of this thesis is to enhance the efficiency of system's scanning detection and provide results visualization.More specifically,the main contribution of this dissertation consists of the following four aspects:(1)Designed a system architecture based on distributed scanners for detectioin and visualizing networking resources;(2)Based on this architecture,proposed a strategy on how to deploy scanning hosts and designed a Distributed Task scheduling Algorithm.(3)Implemented a prototype of the network resource detection and visualization system.(4)Evaluated the functionality of the prototype and the efficiency of the algorithm.The results of experiment show that the deployment strategy of the scanning host designed in this thesis is logical and reasonable.Besides,the designed innovative distributed task allocation algorithm can fulfill the distribution of scanning tasks as well.Under the premise of obtaining the correct scanning result,the efficiency of the device scanning is improved and the real-time and visual representation of the scanning result is achieved.